Composit manager question

[Oleg Sukhodolsky]

On 8/11/06, Daniel Stone <daniel at fooishbar.org> wrote:
> On Fri, Aug 11, 2006 at 01:49:44PM +0400, Oleg Sukhodolsky wrote:
> > EWMH defines a _NET_WM_WINDOW_OPACITY hint to tell a composite manager to
> > make
> > the window translucent. It allows to set just one value for the whole
> > window. Modern
> > application require an alpha-mask to be set to make some areas of the
> > window fully
> > transparent, others to be semi-transparent and the rest to be fully opaque.
> > So the questions:
> > 1. Is or will be there a standard way to set the opacity-mask by means
> > of a hint?
> > 2. If there's no a composite manager running, or the composite manager
> > doesn't support the
> > feature (like old and sweet xcompmgr :) ), what is the right way to
> > set such a mask?
> > Should the application implement the whole composite manager behavior
> > and as such
> > manage all the windows on the user desktop, not only its own windows,
> > or is it enough to use
> > some XComposite and/or XRender Extension features for that? What is
> > the way to detect if
> > the Composite Manager supports setting an alpha-mask instead of just one
> > value?
> >
> > Any real code examples may also assist.
>
> Use an ARGB32 visual.

Not sure I do understand you :(  Is it possible to provide an
explanation for your answer :)

Thanks, Oleg.